n: Someone who celebrates life in all its messy, offbeat, fresh and exciting glory! (also adj, as in "maximalist decor.")

Because she's an unabashed maximalist, Dawn's decor is always a joyous explosion of colors and textures, her living room an edgy, eclectic refuge from the ghastly "tyranny of good taste" that sometimes threatens to flood North America with a beige too far.
OR
Being a maximalist, Sarah enjoys a wide variety of friendships with people of all colors, shapes, sizes, genders, outlooks, and fashion preferences -- boho to preppie to goth to motorcycle to suzie creamcheese.